Thanks, everyone, for your recommendations! My needs are really quite simple, so I'm thinking of going for the RB951Ui-2HnD: http://routerboard.com/RB951Ui-2HnD
Anyone have experience with this device in particular? The simplest and cheapest model seems to be the RB951-2n (http://routerboard.com/RB951-2n), but the 2HnD has a more powerful antenna, more RAM/CPU, and a USB port. Not sure if I need those things in my little home environment, but maybe the USB port will at least be useful for setting up a shared network drive(? it looks like this can be done via Samba?), and for an extra $15, why not? Best, Richard OpenPGP Key ID: CF6FA646 Fingerprint: 9969 43E1 CF6F A646 (See http://www.ocf.berkeley.edu/~rwl/encryption.html for more information.)
